So I do not had any experence with any other devices than the V with pen writing I do not know it better. During the last time i tried several devices using the pen. Even the cheapest do have a much better palm rejection than the V has. So I badly hope for improvement in the near feature. At the moment it is nearly unuseable.

It has been speculated on here that this is because the V charger has no ground connection, meaning the V might build up static charge which can interfere with the touch screen. If you can, try a compatible USB-C charger with a ground pin on the plug.